2013年湖南省益阳市中考化学试卷(含解析版)
2013年湖南省益阳市中考化学试卷一、选择题(本大题包括15小题,每小题只有一个选项符合题意,每小题3分,共45分)1.(3分)在空气中约占空气体积78%的是( )A.氧气B.氮气C.稀有气体D.其它气体和杂质2.(3分)下列现象中发生的变化主要是化学变化的是( )A.水结冰B.瓷器破碎C.海水晒盐D.酒精燃烧3.(3分)健康人的体液必须维持在一定的酸碱度范围内.以下是几种人体体液的正常pH范围,其中酸性最强的是( )A.胆汁(7.1~7.3)B.唾液(6.6~7.1)C.胃液(0.9~1.5)D.血液(7.35~7.45)4.(3分)为了节约资源,美化环境,益阳市已在下辖各区、县开展生...
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